If this is not what is causing your problem, more knowledgeable people might be able to help you, I have not been using IMAP for a while.
I would first check whether the Thunderbird interface is configured to show
all messages or to show unread messages only.
- [Trisquel-users] Mail Disappears From Inbox! handala
- Re: [Trisquel-users] Mail Disappears From Inbox! bobandrew
- Re: [Trisquel-users] Mail Disappears From Inbox! jason
- Re: [Trisquel-users] Mail Disappears From Inbox! ed